/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.antgroup.geaflow.common.blocking.map;

import com.antgroup.geaflow.common.exception.GeaflowRuntimeException;
import java.util.Map;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.TimeUnit;

public class BlockingMap<K, V> {
    private Map<K, ArrayBlockingQueue<V>> map = new ConcurrentHashMap<>();

    private BlockingQueue<V> getQueue(K key) {
        return map.computeIfAbsent(key, k -> new ArrayBlockingQueue<>(1));
    }

    public void put(K key, V value) {
        if (!getQueue(key).offer(value)) {
            throw new GeaflowRuntimeException(String.format("BlockingMap offer element (%s, %s) failed.", key, value));
        }
    }

    public V get(K key) throws InterruptedException {
        return getQueue(key).take();
    }

    public V get(K key, long timeout, TimeUnit unit) throws InterruptedException {
        return getQueue(key).poll(timeout, unit);
    }
}
